NGC 654, NGC 663 and vdB 6

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Location / Date

Zellerndorf, October 2018

Telescope / Mount / Guiding

ASA 10" Astrograph, ASA 3" Wynne-Corrector (focal length 910mm)
ASA DDM60, no Guiding

Camera / Exposure

Moravian G3-16200, Astrodon filters

Lum    76 x 10min
R      18 x 10min
G      18 x 10min
B      18 x 10min

Total exposure time: 21h 40min


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NGC 663 and NGC 654 are a young open star clusters located in the constellation Cassiopeia.

Next to NGC 654 is the small reflection nebula vdB 6. It is illuminated by the blue supergigant star BD+61 315 (spectral class A0Ib/II C) which gives the nebula his characteristic bluish color.

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